Unexpected data grid messages

[Keith Clarke]

Hi folks,
When I open one particular card, I get the message box open with the following...

89,8775,50,dgAlternatingRows
77,8775,50
456,8775,38
380,8775,9
572,8775,1
253,8759,1
241,8759,1,_DrawAlternatingRows
353,0,0,button id 1005 of group id 1004 of card id 1002 of stack "/Applications/LiveCode 4.6.1.app/Contents/Tools/Toolset/revdatagridlibrary.rev"
573,87,1
253,86,1

This looks to be data grid-related but the data grid on this card has long-since been deleted.
Any idea what might be triggering this and how to stop it?
Best,
Keith..